Web7 de set. de 2024 · The region was originally settled by the Greeks and annexed by the Romans in 96BC, followed by Cyrene a couple of decades later. Almost immediately, silphium stocks began to decline at an alarming... Web7 de set. de 2024 · Some think it was driven to extinction, others that it’s still hiding in plain sight as a Mediterranean weed. How did this happen? And could we bring it back?
Cooksonia: A Step Into the Canopy — In Defense of Plants
Cooksonia is an extinct group of primitive land plants, treated as a genus, although probably not monophyletic. The earliest Cooksonia date from the middle of the Silurian (the Wenlock epoch); the group continued to be an important component of the flora until the end of the Early Devonian, a total time span of … Ver mais Only the sporophyte phase of Cooksonia is currently known (i.e. the phase which produces spores rather than gametes). Individuals were small, a few centimetres tall, and had a simple structure. They lacked leaves, … Ver mais The first Cooksonia species were described by William Henry Lang in 1937 and named in honor of Isabel Cookson, with whom he had collaborated and who collected specimens … Ver mais • Cooksonia on Palaeos • Cooksonia, a very old land plant • The Earliest Known Vascular Plant... Except for Baragwanathia Ver mais While reconstructions traditionally depict Cooksonia as a green and red, photosynthesising, self-sufficient stem, it is likely that at least some fossils instead preserve a sporophyte generation which was dependent on a gametophyte for its nutrition – a … Ver mais • Evolutionary history of plants • Polysporangiophyte Ver mais Web5 de jan. de 2024 · ABOVE: Photograph of the obverse and reverse side of a silver Kyrenaic coin, minted by Magas of Kyrene between c. 300 and c. 282 BC. In the Roman world, silphium was still primarily sought after as a food item. For instance, the surviving ancient Roman cookbook De Re Coquinaria, which is believed to have been compiled in around … small houses with 2 bedrooms
The early evolution of land plants, from fossils to genomics: a ...
WebEryops, genus of extinct primitive amphibians found as fossils in Permian rocks in North America (the Permian period occurred from 299 million to 251 million years ago). Eryops was a massive animal more than 2 m (6 feet) … Web19 de abr. de 2015 · The challenge of interpreting the functional biology of Cooksonia raises questions about the function and molecular regulation of basic organs and tissue systems in plants. It has been assumed that stomata and cuticle had similar functions … Web26 de mai. de 2011 · Cooksonia was very primitive and could only live in a narrow set of conditions. Like many other extinct organisms, it was out-competed by organisms that were better adapted and had better... sonic idw panels